Metal-working machine.



HUN 2 In van tor: 1?. M Wflanson fly ms A66 Patented Jan.4, 1910.

III/l B. M. W. HANSON. METAL WORKING MACHINE. APPLIOATION rum) nnc. 23,1908.

Witnesses-:

@M' WW UNITED STATES PATENT OFFICE.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

METAL-WORKING MACHINE.

Specification of Letters Patent 945,456. g eed Jan. 4, 1910.

Application filed December 2a, 1908. Serial No. 468,948.

scribed in detail. The screw 7 is normally held against endwise movement and when in this relation it will be evident that by turning the handle or crank 8 said screw can be Be it known that I, Bauer M. W. Hanson, a citizen of the United States, residing at T 0 all whom it may concern: Hartford, in the county of Hartford and i State of Connecticut, have invented certain turned to thereby through the nut 6 operate new and useful Improvements in Metalthe cross slide 4 to move the latter toward or Working Machines, of which the following from the work so that the tool carried by the is a specification. post 5 can be adjusted with respect to the This invention relates to metal working work. The tool therefore so far as its movemachines and more especially to lathes the mcnt toward and from the work is concerned. 5 primary object of the invention being to prois adjusted by the manipulation of the feed vide simple and effective means for bodily screw 7. There are times when it is very'deshifting the cross-slide or analogous member sirable to move the tool away from the work independently of the usual feed-screw and without disturbing the adjustment thereof nut or equivalent means whereby said cross and I find that cam mechanism is very adslide can be moved toward or from the work vantageous for this purpose. For instance or similar functions obtained without affectwhen the carriage 3 has reached the end of ing the adjustment thereof. its advancing stroke I can move the cross The invention possesses other advantaslide 4 bodily away from the work without geous features which with the foregoing will affecting the relation between the screw 7 be set forth in the accompanying description and its coacting nut 6 and while this condiwherein is outlined that form of embodiment tion is present can return the carriage to its of the invention which I have selected for primary position at which pointthe reverse illustration in'the drawings accompanying bodily movement of the cross slide will be and forming part of the present specificaaccomplished and this again without ehangtion. ing the relation between said screw and nut. Referring to said drawings, Figure 1 is a I will hereinafter describe fully that simtransverse sectional view of a lathe equipped ple embodiment of cam mechanism which I with devices embodying my invention, Fig. 2 have illustrated for shifting the cross slide is a horizontal section on the line 2-2 of and I might state at this point that said Fig. 1, and, Fig. 3 is avertical section on the cam mechanism acts preferably in conjuncline 3 3 Fig. 1. tion with a bearing which sustains or aids in Like characters refer to like parts throughsupporting said feed screw 7. There is out the several figures of the drawings. shown as surrounding said feed-screw 7 a My invention can be incorporated in varibearing 10 which may be conveniently made .96 ous kinds of machines and in the drawings I in the form of an elongated sleeve. The inhave illustrated portions of an engine lathe ner end of this sleeve is shown as bearing of known construction and these portions I against one end of the barrel pinion 9 while will be briefly described. the outer end thereof is shown as bearing In Fig. 1 of the drawings the numeral 2 i against a collar as 11 rigid on said feed- 9:) denotes the base or bed of the machine and I l screw. The said bearing 10 in the present have shown as longitudinally reciprocative case is reciprocative and it follows therefore thereon a carriage as 3 upon which is repre- I that when said bearing is retracted or moved sented the usual cross slide 4 equipped with outward the feed-screw 7 and hence the nut its usual adjuncts including the tool post 5. j 6 and cross slide 4 will be similarly moved 1 There is shown on the underside of said so as to carry the tool on the tool post 5 slide the nut 6 rigid therewith. Coiiperative away from the work. When said bearing is with said nut is a feed-screw as7 represented thrust inward the opposite action will ocras-provided at its forward or outer end with our; that is the tool will be moved toward a handle as 8. Feathered or otherwise suitthe work. The bearing 10 is represented as 1 ablyfastened to said screw 7 is a pinion 9 in supported for sliding movement by a box mesh with a gear as 9' forming part of the l or casing like bracket as 12 rigidly fastened customary power-operated mechanism for in some suitable manner to the carriage 3, turnin said screw but which as it forms no screw or bolts 13 satisfactorily answering part of the present invention need not be dethis purpose. Said bracket is therefore immovable or stationary with respect to the reciprocative bearing 10. The said bracket 12 has an opening 14 therein in which said bearing slides the sides of the bearing being shown as flattened to engage the correspondingly shaped walls of said opening 14 which presents a simple means to prevent turning of said bearing 10. p

The cam mechanism to which allusion has been made preferably acts against said bearing 10 and it is of such a nature that it not only imparts to the bearing the necessary strokes but also looks said bearing positively and unyieldingly in its backward and forward positions the locking of the bearing in its forward position being advanta eous in that the tool can be maintained in rm and solid engagement with the work.

The box or chambered bracket 12 is shown as inclosing a sliding block or plate 15 which in the present instance has a movement transverse to that of the reciprocative hearing 10 and which constitutes a cam device for effecting the actions to which I have re ferred. In the upper side of said block or plate there is shown a groove or channel 16 which is illustrated as being composed of two straight portions 17 and 18 and a connecting oblique portion 19 said straight portions being preferably at right angles to the bearing 10. Said bearing is represented as equipped with a pendent stud 20 to fit said groove 16' and said stud may as shown consist of an anti-friction roller. A groove of the kind set forth presents a simple means for securing the reciprocation of the bearing 10 and the locking of the same in its two extreme positions and it also gives to the said bearing a definite throw both forwardly and backwardly. It will be assumed and as illustrated in Fig. 2 that the anti-friction roller 20 is located in the straight portion 17 of said groove 16. This being so the tool through the intermediate parts will be held in solid contact with the work owing to the fact that the bearing 10 is locked in its advance position. It will be further assumed that the sliding block or plate 15 is moved in the direction of the arrow in said Fig. 2 a distance sufficient to cause said roller to enter the portion 18. Said antifriction roller as the slide is thus operated will leave the portion 17 and enter and then pass through and out the portion 19 into the portion 18 the result being that the bearing 10 is slid outward so as to bodily retract the cross slide 4 and to also look said cross slide in said retracted position while the roller is in said portion 18. To return the tool to its initial position the said slide is moved to the position shown in said Fig. 2.

.As a convenient means for' operating the cam slide 15 i may provide a handlever as r21 shown as fulcrumed at its forward or inner end to the underside of the box-like bracket 12 and as having its handle in p0- sition to be readily accessible to the attendant of the machine; in fact said handle is quite adjacent to the arm or handle 8. I have illustrated as tapped into the underside of said lever between the ends thereof a stud 22 depending therefrom and extending through a slot 23 in the bottom of the said bracket. This stud is shown as passing through a longitudinal slot 24 in the hand lever 21. It should be stated that the slot 23 is elongated longitudinally of the sliding cam plate 15. By operating said lever therefore it is a cam plate to either move the cross slide 4 bodily toward or from the work and without in anywise chan ing the relation between the screw 7 an its nut 6. The end means for limiting the throw of the said lever 21 whereby excessive movement thereof will not be possible, notwithstanding the fact that I make the groove 16 open at its opposite ends.

As will be gathered from what has been stated I have described in detail that form I of embodiment of invention selected for illustration in the accompanying drawings, this being so that those skilled in the art can practice said invention. I do not restrict myself to the disclosure made by the drawings and description for many changes I can be adopted-within the spirit of my invention and as set forth in my claim.

Having described the invention what I claim is:

The combination of a cross slide, a nut and a feed-screw for adjusting said cross slide, a reciprocatory bearing for reciprocating said feed-screw and having a stud, and a reciprocatory slide having a groove com- I posed of two straight portions and a connecting oblique portion said stud being i adapted to enter all three of the portions of the slide.

In testimony whereof I afiix my signature in presence of two witnesses.

BENGT M. W. HANSON.

groove on the reciprocation of said Witnesses:

HEATH SUTHERLAND, F. E. ANDERSON.

simple matter to shift said 

